Other pilgrimages are mentioned as having taken place before the end of the ninth century, at which time new wars broke out between the Greeks and the Saracens, in the course of which the whole of Judea was taken from the Mohammedans by the emperor John Zimisces, and the holy places were again thrown open to pilgrims from all parts. On the death of Zimisces, in 976, the Greek empire again sunk into weakness, and Palestine was snatched from them by the Fatimite khalifs of Egypt, whose policy it was at first to treat the Christians with lenity, seek commercial relations with the Franks, and encourage the pilgrimages to the holy places. But all these fair prospects were soon cut short by the accession to the throne of Hakem, the third khalif of the Fatimite dynasty, who threw his kingdom into confusion by his cruel despotism, and who made the unfortunate Christians feel the whole weight of his fury. They were everywhere oppressed and massacred, their churches were taken from them, profaned, and destroyed, and the holy places were deserted. During the whole of the eleventh century the Christians of Syria were thus treated with every kind of indignity. Pilgrims still made their way to Jerusalem, and a great number of brief notices of their adventures are preserved by the numerous writers of the age; but they brought back with them little more than complaints of the profanations to which the holy places were exposed, and of the wretched condition to which their brothers in faith had been reduced. The celebrated Gerbert, afterwards pope, under the name of Sylvestre II., was one of the first who made the pilgrimage during the persecutions of Hakem; and on his return, in 986, he published a letter, in which he made Jerusalem deplore her misfortunes, and supplicated the whole Christian world to come to her aid. The French and the Italians were excited to vengeance, and they began to make pilgrimages in armed bodies, and even to attack the coasts of Syria. This only served to exasperate their enemies, who interdicted the Christians in their dominions from the exercise of their religion, took from them their churches, which they profaned by turning them into stables and to still more degrading purposes, and threw down the church of the Sepulchre, and the other sacred places in Jerusalem, in 1008. According to the best authorities the church of the Holy Sepulchre was rebuilt by Hakem's grandson, Al-Mostanser-Billah, between 1046 and 1048, in consequence of a treaty with the Byzantine emperor.